Function catch_panic 

pub fn catch_panic<F>(f: F) -> FfiResult
where
    F: FnOnce() -> Result<FfiBuffer, FfiError> + UnwindSafe,

Run f and convert any Rust panic into an FfiResult error.

This is the critical safety wrapper used by every extern "C" function in this crate. A panic unwind crossing the FFI boundary is undefined behaviour; catch_panic ensures it never happens.

Example

#[no_mangle]
pub extern "C" fn my_ffi_fn(buf: FfiBuffer) -> FfiResult {
    catch_panic(|| {
        // ... do work, return Result<FfiBuffer, FfiError>
        Ok(buf)
    })
}